Sure, there are Ute fans who are anti-BYU because of that religion. I suspect you're not hanging out with them on the regular. And Lolo was specifically talking about a returned missionary, so she probably isn't one of those fans.
And it's a different flavor of arrogance I get from BYU fans, usually assuming I'm too stupid to get into BYU or bitter because I applied and didn't get in (both untrue) although I get the religious one too occasionally (a good friend of mine when we first met at church told me "Everyone I know who went to the U has left the church")
So again, my point remains the same. Either get better friends, or toughen up.